Yesterday i was Upgrade My server RAM from 8 Gig to 16 Gig after this process my web server was unstable and goes down over and over , after investigate I found when Apache request Process being about 900 - 1000 then webserver not response , while before RAM upgrade over 2500 - 3000 request was handle without any Problem.
I was change Apache config , but not resolved this Issue. anybody can help ?